论文标题
旋转裸奇异的光轨迹和阴影形状
Light trajectory and shadow shape in the rotating naked singularity
论文作者
论文摘要
在本文中，我们研究了旋转版本的裸象征性（NNS）时空中的光轨迹和阴影特性，该时期是使用Newman-Janis算法而无需复杂方法得出的。我们讨论了旋转裸奇异性（RNS）时空的一些几何特性和因果结构。分析了旋转的裸奇异性中的重力镜头，并将结果与Kerr黑洞的重力进行了比较。在Kerr黑洞的情况下，对于术前和逆行光子轨道而存在光子球，而对于RN，光子球仅存在于逆行光子轨道。结果，赤裸裸的奇异性投射出弧形的阴影，与Kerr Black Hole铸造的轮廓形阴影不同。
In this paper, we investigate the light trajectories and shadow properties in the rotating version of null naked singularity (NNS) spacetime which is derived using the Newman- Janis algorithm without complexification method. We discuss some of the geometrical properties and causal structure of Rotating Naked Singularity (RNS) spacetime. The gravitational lensing in a rotating naked singularity is analyzed, and the results are compared to those of a Kerr black hole. In the case of a Kerr black hole, the photon sphere exists for both prograde and retrograde photon orbits, whereas for RNS, the photon sphere exists only for retrograde photon orbits. As a result, the naked singularity projects an arc-shaped shadow that differs from the contour-shaped shadow cast by a Kerr black hole.
